MaxSessions

Sets the maximum number of sessions supported.

This parameter applies to imtcp: TCP Syslog Input Module.

Name:

MaxSessions

Scope:

module, input

Type:

integer

Default:

module=200, input=module parameter

Required?:

no

Introduced:

at least 5.x, possibly earlier

Description

Sets the maximum number of sessions supported. This must be set before the first $InputTCPServerRun directive.

The same-named input parameter can override this module setting.

Each session owns its framing, transport, TLS, and optional decompressor state. Consequently, unusually large values multiply the memory retained by idle or incomplete connections. A zlib stream:always session has a bounded history window of at most 32 KiB plus decoder bookkeeping; completed zlib streams release that decoder state immediately, but incomplete streams retain it until the connection closes. Size MaxSessions for the listener’s expected concurrency and available memory.

Module usage

module(load="imtcp" maxSessions="500")

Input usage

input(type="imtcp" port="514" maxSessions="500")

Legacy names (for reference)

Historic names/directives for compatibility. Do not use in new configs.

  • $InputTCPMaxSessions — maps to MaxSessions (status: legacy)

See also

See also imtcp: TCP Syslog Input Module.

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